Support DTMF events

actions.js

@@ -12,6 +12,7 @@ const RNCallKitPerformEndCallAction = 'RNCallKitPerformEndCallAction';
 const RNCallKitDidActivateAudioSession = 'RNCallKitDidActivateAudioSession';
 const RNCallKitDidDisplayIncomingCall = 'RNCallKitDidDisplayIncomingCall';
 const RNCallKitDidPerformSetMutedCallAction = 'RNCallKitDidPerformSetMutedCallAction';
+const RNCallKitPerformPlayDTMFCallAction = 'RNCallKitPerformPlayDTMFCallAction';
 
 didReceiveStartCallAction = handler => {
     const listener = _RNCallKitEmitter.addListener(
@@ -57,10 +58,18 @@ didPerformSetMutedCallAction = handler => (
     )
 )
 
+playDTMF = handler => (
+    _RNCallKitEmitter.addListener(
+        RNCallKitPerformPlayDTMFCallAction,
+        (data) => { handler(data); }
+    )
+)
+
 export const listeners = { 
     didReceiveStartCallAction,
     answerCall,
     endCall,
+    playDTMF,
     didActivateAudioSession,
     didDisplayIncomingCall,
     didPerformSetMutedCallAction,

ios/RNCallKit/RNCallKit.m

@@ -24,6 +24,7 @@
 static NSString *const RNCallKitDidActivateAudioSession = @"RNCallKitDidActivateAudioSession";
 static NSString *const RNCallKitDidDisplayIncomingCall = @"RNCallKitDidDisplayIncomingCall";
 static NSString *const RNCallKitDidPerformSetMutedCallAction = @"RNCallKitDidPerformSetMutedCallAction";
+static NSString *const RNCallKitPerformPlayDTMFCallAction = @"RNCallKitPerformPlayDTMFCallAction";
 
 @implementation RNCallKit
 {
@@ -67,7 +68,8 @@ - (void)dealloc
              RNCallKitPerformEndCallAction,
              RNCallKitDidActivateAudioSession,
              RNCallKitDidDisplayIncomingCall,
-             RNCallKitDidPerformSetMutedCallAction
+             RNCallKitDidPerformSetMutedCallAction,
+             RNCallKitPerformPlayDTMFCallAction
              ];
 }
 
@@ -453,6 +455,15 @@ - (void)provider:(CXProvider *)provider performSetHeldCallAction:(CXSetHeldCallA
 #endif
 }
 
+- (void)provider:(CXProvider *)provider performPlayDTMFCallAction:(CXPlayDTMFCallAction *)action {
+#ifdef DEBUG
+    NSLog(@"[RNCallKit][CXProviderDelegate][provider:performPlayDTMFCallAction]");
+#endif
+    NSString *callUUID = [self containsLowerCaseLetter:action.callUUID.UUIDString] ? action.callUUID.UUIDString : [action.callUUID.UUIDString lowercaseString];
+    [self sendEventWithName:RNCallKitPerformPlayDTMFCallAction body:@{ @"digits": action.digits, @"callUUID": callUUID }];
+    [action fulfill];
+}
+
 - (void)provider:(CXProvider *)provider timedOutPerformingAction:(CXAction *)action
 {
 #ifdef DEBUG